Otsego, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 54.4 °F (high). Annual precipitation averages 31.9 Inches. Otsego is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.1 °F | 22.6 °F | 0.77 in. |
| February | 8.5 °F | 27.4 °F | 0.82 in. |
| March | 20.9 °F | 40.3 °F | 1.54 in. |
| April | 33.9 °F | 55.1 °F | 2.86 in. |
| May | 46.9 °F | 68.4 °F | 4.25 in. |
| June | 57.5 °F | 77.9 °F | 4.5 in. |
| July | 62.0 °F | 82.5 °F | 4.26 in. |
| August | 59.3 °F | 80.0 °F | 4.02 in. |
| September | 51.0 °F | 72.2 °F | 3.43 in. |
| October | 38.0 °F | 57.2 °F | 2.71 in. |
| November | 25.3 °F | 41.6 °F | 1.58 in. |
| December | 12.5 °F | 27.7 °F | 1.11 in. |
| Annual | 35.1 °F | 54.4 °F | 31.85 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |